sys/sys/rman.h

   1 /*
   2  * Copyright 1998 Massachusetts Institute of Technology
   3  *
   4  * Permission to use, copy, modify, and distribute this software and
   5  * its documentation for any purpose and without fee is hereby
   6  * granted, provided that both the above copyright notice and this
   7  * permission notice appear in all copies, that both the above
   8  * copyright notice and this permission notice appear in all
   9  * supporting documentation, and that the name of M.I.T. not be used
  10  * in advertising or publicity pertaining to distribution of the
  11  * software without specific, written prior permission.  M.I.T. makes
  12  * no representations about the suitability of this software for any
  13  * purpose.  It is provided "as is" without express or implied
  14  * warranty.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
  17  * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
  18  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
  20  * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  23  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  25  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  26  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $FreeBSD: src/sys/sys/rman.h,v 1.5.2.1 2001/06/05 08:06:07 imp Exp $
  30  */
  31
  32 #ifndef _SYS_RMAN_H_
  33 #define _SYS_RMAN_H_
  34
  35 #ifndef _SYS_TYPES_H_
  36 #include <sys/types.h>
  37 #endif
  38 #ifndef _SYS_QUEUE_H_
  39 #include <sys/queue.h>
  40 #endif
  41 #ifndef _SYS_BUS_H_
  42 #include <sys/bus.h>    /* bus_space_tag_t */
  43 #endif
  44
  45 #define RF_ALLOCATED    0x0001  /* resource has been reserved */
  46 #define RF_ACTIVE       0x0002  /* resource allocation has been activated */
  47 #define RF_SHAREABLE    0x0004  /* resource permits contemporaneous sharing */
  48 #define RF_TIMESHARE    0x0008  /* resource permits time-division sharing */
  49 #define RF_WANTED       0x0010  /* somebody is waiting for this resource */
  50 #define RF_FIRSTSHARE   0x0020  /* first in sharing list */
  51 #define RF_PREFETCHABLE 0x0040  /* resource is prefetchable */
  52 #define RF_OPTIONAL     0x0080  /* for bus_alloc_resources() */
  53
  54 #define RF_ALIGNMENT_SHIFT      10 /* alignment size bit starts bit 10 */
  55 #define RF_ALIGNMENT_MASK       (0x003F << RF_ALIGNMENT_SHIFT)
  56                                 /* resource address alignemnt size bit mask */
  57 #define RF_ALIGNMENT_LOG2(x)    ((x) << RF_ALIGNMENT_SHIFT)
  58 #define RF_ALIGNMENT(x)         (((x) & RF_ALIGNMENT_MASK) >> RF_ALIGNMENT_SHIFT)
  59
  60 enum    rman_type { RMAN_UNINIT = 0, RMAN_GAUGE, RMAN_ARRAY };
  61
  62 /*
  63  * String length exported to userspace for resource names, etc.
  64  */
  65 #define RM_TEXTLEN      32
  66
  67 /*
  68  * Userspace-exported structures.
  69  */
  70 struct u_resource {
  71         uintptr_t       r_handle;               /* resource uniquifier */
  72         uintptr_t       r_parent;               /* parent rman */
  73         uintptr_t       r_device;               /* device owning this resource */
  74         char            r_devname[RM_TEXTLEN];  /* device name XXX obsolete */
  75
  76         u_long          r_start;                /* offset in resource space */
  77         u_long          r_size;                 /* size in resource space */
  78         u_int           r_flags;                /* RF_* flags */
  79 };
  80
  81 struct u_rman {
  82         uintptr_t       rm_handle;              /* rman uniquifier */
  83         char            rm_descr[RM_TEXTLEN];   /* rman description */
  84
  85         u_long          rm_start;               /* base of managed region */
  86         u_long          rm_size;                /* size of managed region */
  87         enum rman_type  rm_type;                /* region type */
  88 };
  89
  90 #ifdef _KERNEL
  91 /*
  92  * We use a linked list rather than a bitmap because we need to be able to
  93  * represent potentially huge objects (like all of a processor's physical
  94  * address space).  That is also why the indices are defined to have type
  95  * `unsigned long' -- that being the largest integral type in Standard C.
  96  */
  97 TAILQ_HEAD(resource_head, resource);
  98 struct  resource {
  99         TAILQ_ENTRY(resource)   r_link;
 100         LIST_ENTRY(resource)    r_sharelink;
 101         LIST_HEAD(, resource)   *r_sharehead;
 102         u_long  r_start;        /* index of the first entry in this resource */
 103         u_long  r_end;          /* index of the last entry (inclusive) */
 104         u_int   r_flags;
 105         void    *r_virtual;     /* virtual address of this resource */
 106         bus_space_tag_t r_bustag; /* bus_space tag */
 107         bus_space_handle_t r_bushandle; /* bus_space handle */
 108         device_t r_dev;         /* device which has allocated this resource */
 109         struct  rman *r_rm;     /* resource manager from whence this came */
 110         int     r_rid;          /* optional rid for this resource. */
 111 };
 112
 113 struct lwkt_token;
 114
 115 struct  rman {
 116         struct  resource_head   rm_list;
 117         struct  lwkt_token      *rm_slock; /* mutex used to protect rm_list */
 118         TAILQ_ENTRY(rman)       rm_link; /* link in list of all rmans */
 119         u_long  rm_start;       /* index of globally first entry */
 120         u_long  rm_end;         /* index of globally last entry */
 121         enum    rman_type rm_type; /* what type of resource this is */
 122         const   char *rm_descr; /* text descripion of this resource */
 123         int     rm_cpuid;       /* owner cpuid */
 124 };
 125 TAILQ_HEAD(rman_head, rman);
 126
 127 int     rman_activate_resource(struct resource *r);
 128 #if 0
 129 int     rman_await_resource(struct resource *r, int slpflags, int timo);
 130 #endif
 131 int     rman_deactivate_resource(struct resource *r);
 132 int     rman_fini(struct rman *rm);
 133 int     rman_init(struct rman *rm, int cpuid);
 134 int     rman_manage_region(struct rman *rm, u_long start, u_long end);
 135 int     rman_release_resource(struct resource *r);
 136 struct  resource *rman_reserve_resource(struct rman *rm, u_long start,
 137                                         u_long end, u_long count,
 138                                         u_int flags, device_t dev);
 139 uint32_t rman_make_alignment_flags(uint32_t size);
 140
 141 #define rman_get_start(r)       ((r)->r_start)
 142 #define rman_get_end(r)         ((r)->r_end)
 143 #define rman_get_device(r)      ((r)->r_dev)
 144 #define rman_set_device(r,dev)  ((r)->r_dev = (dev))
 145 #define rman_get_size(r)        ((r)->r_end - (r)->r_start + 1)
 146 #define rman_get_flags(r)       ((r)->r_flags)
 147 #define rman_set_virtual(r,v)   ((r)->r_virtual = (v))
 148 #define rman_get_virtual(r)     ((r)->r_virtual)
 149 #define rman_set_bustag(r,t)    ((r)->r_bustag = (t))
 150 #define rman_get_bustag(r)      ((r)->r_bustag)
 151 #define rman_set_bushandle(r,h) ((r)->r_bushandle = (h))
 152 #define rman_get_bushandle(r)   ((r)->r_bushandle)
 153 #define rman_set_rid(r,i)       ((r)->r_rid = (i))
 154 #define rman_get_rid(r)         ((r)->r_rid)
 155 #define rman_is_region_manager(r,rm) ((r)->r_rm == rm)
 156 #define rman_get_cpuid(r)       ((r)->r_rm->rm_cpuid)
 157
 158 extern  struct rman_head rman_head;
 159 #endif /* _KERNEL */
 160
 161 #endif /* !_SYS_RMAN_H_ */